Rotary manipulation type electronic device

ABSTRACT

The present invention provides a rotary manipulation type electronic device which permits one to obtain a feel of manipulations during rotational manipulations and produces lilting sounds of manipulations to thereby obtain an audiological sense of manipulations. The rotary manipulation type electronic device of the present invention has a base body with which a rotary body is rotatably combined. An operative element is disposed in such a way that movement of the operative element is restricted by the inside wall of a terminal leading portion of the base body and by leg portions of a leaf spring. Engagement portions engaging an uneven portion of the top surface of a flange portion of the rotary body protrude from the operative element. The leaf spring is brought into elastic contact with the top surface of the operative element.

FIELD OF THE INVENTION

The present invention relates to a rotary manipulation type electronic device consisting chiefly of a rotationally manipulated volume control or encoder used to adjust the volume, sound quality, image quality, or the like of an AV device or used for temperature control of an in-vehicle air conditioning system.

BACKGROUND OF THE INVENTION

In recent years, there has been a demand for rotationally manipulated volume controls and encoders which are mounted in AV devices and in-vehicle air-conditioning systems and which produce lilting sounds of manipulations that can be felt comfortable in terms of the audible sense together with feeling of manipulations transmitted to the hand when they are rotationally manipulated.

Conventional, rotary manipulation type electronic devices are now described taking a rotationally manipulated encoder as an example by referring to drawings.

FIG. 12 is a cross-sectional view of a conventional, rotationally manipulated encoder. FIG. 13 is an exploded perspective view of the conventional, rotationally manipulated encoder. In these figures, base body 1 has a central portion forming hollow portion 1A and is substantially annular. The upper side is open. Three fixed contacts 2 consisting of a common contact and two contacts for signals are disposed on the bottom surface of the opening portion. These fixed contacts 2 are arranged on the same circumference and spaced from each other by 1200 insulatively. Contact terminal 3A for a signal, contact terminal 3B for a signal, and common contact terminal 3C are electrically connected with three fixed contacts 2, respectively, and extend outwardly as one row from terminal leading portion 1C protruding from the side wall of base body 1. These terminals 3A, 3B, and 3C constitute terminal portion 3.

Rotary body 5 has cylindrical portion 5B and flange portion 5C located below cylindrical portion 5B where central hole 5A is formed. Uneven portion 5D is formed over the whole periphery of the top surface of flange portion 5C. Sliding contact 4 is fixedly held to the bottom surface of flange portion 5C. Sliding contact 4 has contact portions 4A at three locations which are circumferentially equally spaced from each other by 120° to produce ON/OFF signals by making sliding motion on three fixed contacts 2. In rotary body 5, the inner surface of cylindrical portion 5B is fitted over the outer surface of inner peripheral wall 1B forming hollow portion 1A of base body 1. The rotary body is combined rotatably.

Cover plate 6 covers the opening portion of base body 1 while permitting upper portions of cylindrical portion 5B of rotary body 5 and of inner peripheral wall 1B of base body 1 to protrude from center hole 6A. The cover plate is made of a metal plate and crimped around base body 1. Annular leaf spring 7 is mounted to the bottom surface of cover plate 6.

This leaf spring 7 has a central horizontal portion whose both sides are bent obliquely downwardly as viewed from a side. Downwardly protruding protrusive portions 7A are formed in opposite positions forming front-end portions which are bent as described above. Protrusive portions 7A in the two locations are in elastic contact with uneven portion 5D formed on the top surface of flange portion 5C of the above-described rotary body 5 while cover plate 6 is crimped to base body 1.

In the structure described so far, if cylindrical portion 5B of rotary body 5 protruding upwardly from center hole 6A in cover plate 6 is rotationally manipulated, contact portions 4A of sliding contact 4 on the bottom surface of flange portion 5C slide on fixed contacts 2 in turn, it being noted that contacts 2 are formed on the bottom surface of the opening portion of base body 1. A train of ON/OFF signals is produced between terminals 3A and 3C electrically connected with fixed contacts 2. A second train of ON/OFF signals is produced between terminals 3B and 3C. Processing corresponding to the direction of rotation is performed in a signal processing circuit in the installed device by the two trains of ON/OFF signals. For example, a function of increasing or reducing the volume is activated.

Because of the rotation of this rotary body 5, protrusive portions 7A at the two locations of leaf spring 7 fixed to the bottom surface of cover plate 6 make sliding motion while making elastic contact with uneven portion 5D formed on the top surface of flange portion 5C of rotary body 5. Consequently, a feeling of clicking (feeling of moderateness) corresponding to the position of uneven portion 5D is produced.

For example, Japanese Patent Unexamined Publication No. 1998-199371 is known as prior art documentary information associated with the invention.

However, in the above-described conventional, rotationally manipulated encoder (rotary manipulation type electronic device), sound of manipulation produced as a result of rotational manipulation of rotary body 5 is only low-pitched, dull sound produced simultaneously with a feeling of clicking occurring when protrusive portions 7A of leaf spring 7 described above slide on uneven portion 5D on the top surface of flange portion 5C while making elastic contact with the uneven portion. Therefore, there is the problem that it is difficult to produce lilting sound of manipulation, which is a demand from the market.

SUMMARY OF THE INVENTION

A rotary manipulation type electronic device includes: a base body having an opening portion in which a functional part is provided, the functional part generating an electric signal by contact with a sliding contact; a rotary body having the sliding contact on its bottom surface and an uneven portion on its outer periphery, the rotary body being rotatably supported to the base body; a leaf spring making elastic contact with the uneven portion; and a cover plate having the leaf spring on its bottom surface, the cover plate providing a cover over the opening portion of the base body. The rotary manipulation type electronic device comprises an operative element having an engagement portion that makes engagement with the uneven portion. Motion of the operative element in the direction of rotation of the rotary body and in the outward direction going away from the center of rotation is restricted. The operative element is pushed downward by the leaf spring and disposed so as to be movable up and down.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of a rotationally manipulated encoder according to an embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view of the rotationally manipulated encoder according to the embodiment 1 of the invention.

FIG. 3 is a cutaway perspective view of main portions of the rotationally manipulated encoder according to the embodiment 1 of the invention.

FIG. 4 is a plan view of the main portions of the rotationally manipulated encoder according to the embodiment 1 of the invention, showing the state in which the cover plate and leaf spring have been removed.

FIG. 5 is a cross-sectional view of FIG. 4, for illustrating the operation.

FIG. 6 is a cross-sectional view of FIG. 4, for illustrating the operation.

FIG. 7 is a cross-sectional view of FIG. 4, for illustrating the operation.

FIG. 8 is a cross-sectional view of FIG. 4, for illustrating the operation.

FIG. 9 is an exploded perspective view of a rotationally manipulated encoder according to an embodiment 2 of the invention.

FIG. 10 is a cutaway perspective view of main portions of the rotationally manipulated encoder according to the embodiment 2 of the invention.

FIG. 11 is a cross-sectional view of main portions of the rotationally manipulated encoder according to the embodiment 2 of the invention.

FIG. 12 is a cross-sectional view of a conventional, rotationally manipulated encoder.

FIG. 13 is an exploded perspective view of the conventional, rotationally manipulated encoder.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The present invention is intended to solve the aforementioned problems with the prior art, and provides a rotary manipulation type electronic device which permits one to obtain a feeling of manipulations when the part is rotationally manipulated and produces lilting sounds of manipulations, thus permitting one to obtain audiological feeling of manipulations, too.

The present invention is hereinafter described with reference to FIGS. 1 to 11.

A rotationally manipulated encoder is described as one example of rotary manipulation type electronic device according to the present invention. However, the rotary manipulation type electronic device of the present invention is not limited to a rotationally manipulated encoder. Furthermore, those parts which are identical in configuration with FIGS. 12 and 13 are denoted by the same symbols and their detailed description is simplified.

Embodiment 1

FIG. 1 is a cross-sectional view of a rotationally manipulated encoder according to an embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of a rotationally manipulated encoder according to the embodiment 1 of the invention. FIG. 3 is a cutaway perspective view of main portions of the rotationally manipulated encoder according to the embodiment 1 of the invention. FIG. 4 is a plan view of main portions of the rotationally manipulated encoder according to the embodiment 1 of the invention, showing the state in which the cover plate and leaf spring have been removed. FIGS. 5-8 are cross-sectional views of FIG. 4, and are views for illustrating the operation.

In these figures, base body 1 has hollow portion 1A in the center, is substantially annular, and is open on the upper side. Three fixed contacts 2 are arranged on the bottom surface of the opening portion 1D of base body 1 and disposed on the same circumference such that they are circumferentially equally spaced from each other. Terminal 3A, terminal 3B, and terminal 3C electrically connected with these fixed contacts 2 are arrayed in a row and extend outwardly from terminal leading portion 1C protruding from the side wall of base body 1. These terminals 3A, 3B, and 3C constitute terminal portion 3. Terminal portion 3 is one example of functional part which produces an electrical signal by contact with a sliding contact.

The inner periphery of cylindrical portion 5B forming central hole 5A in rotary body 5 is fitted over the outer periphery of inner peripheral wall 1B forming hollow portion 1A of base body 1. Thus, rotary body 5 is combined rotatably. Substantially wavy uneven portion 5D which is uniformly arranged over the whole periphery of the top surface is formed on flange portion 5C located below rotary body 5. Sliding contact 4 which has three contact portions 4A on its bottom surface and slides on fixed contacts 2 is fixedly held to flange portion 5C that is under this rotary body 5.

Cover plate 6 made of a metal plate covers the opening portion 1D of base body 1 while permitting upper portions of cylindrical portion 5B of rotary body 5 and of inner peripheral wall 1B of base body 1 to protrude upward from center hole 6A. The cover plate is crimped around base body 1. Annular leaf spring 17 is mounted to the bottom surface of this cover plate 6.

Annular leaf spring 17 has protrusive portion 17A. Protrusive portion 17A has a central portion that is made of a flat plate portion as viewed from a side. Both sides are bent from end portions of the flat plate portion obliquely downwardly, are located on the opposite side of terminal leading portion 1C of base body 1, and protrude downward. This protrusive portion 17A is in elastic contact with uneven portion 5D formed on the top surface of flange portion 5C of rotary body 5 while cover plate 6 is crimped and held to base body 1.

Since protrusive portion 17A is in elastic contact with uneven portion 5D, a feeling of clicking is obtained when protrusive portion 17A slides past uneven portion 5D according to rotational manipulation of rotary body 5.

In the present embodiment 1, as also shown in FIG. 3, the other side of protrusive portion 17A of leaf spring 17 is bent. The front end portion bent in this way is in elastic contact with an upper portion of operative element 19 die cast from zinc. Operative element 19 is disposed inside of terminal leading portion 1C protruding from a side wall of base body 1. Thus, the front end portion pushes operative element 19 downward. Leg portions 18 bent downward are mounted to the front end portion for restriction of the position of operative element 19. Three leg portions 18 are made up of leg 18A, leg 18B, and leg 18C.

In this annular leaf spring 17, the position at which protrusive portion 17A is mounted and the position at which operative element 19 is brought into elastic contact are located opposite to each other. Thus, the load at which protrusive portion 17A makes elastic contact with uneven portion 5D and the load at which operative element 19 is brought into elastic contact are applied with good balance on the opposite sides of the flat plate portion in the central portion. Therefore, stable spring load can be maintained for a long time.

The positions at which legs 18A and 18C that are at both ends of leg portions 18 are bent are equidistant from the center of rotation of rotary body 5 and are proximity positions which are not in contact with the outer peripheral end of flange portion 5C of rotary body 5. The position at which central leg 18B is bent is located more radially outwardly of rotary body 5 than legs 18A and 18C at both ends. The spacing between central leg 18B and each of legs 18A and 18C at both ends is set slightly greater the width of operative element 19. Operative element 19 is located between central leg 18B and legs 18A and 18C at both ends. The position of operative element 19 is restricted by two legs 18A and 18C at both ends and by central outer one leg 18B such that the distance from the center of rotation of rotary body 5 does not deviate greatly.

In this operative element 19, semicylindrical engagement portion 19A engaging uneven portion 5D of rotary body 5 protrudes toward the center of rotation of rotary body 5. Since the top surface of operative element 19 receives downward spring pressure from leaf spring 17, the arc-shaped portion of the bottom surface of engagement portion 19A is in elastic contact with uneven portion 5D of flange portion 5C.

Furthermore, as shown in FIG. 4, the gap between the inside wall of terminal leading portion 1C of base body 1 and the end portion of operative element 19 is set to have a small dimension to permit operative element 19 to move slightly in the direction of rotation and in the direction going outwardly from the center of rotation.

In the rotationally manipulated encoder constructed as described so far, if cylindrical portion 5B of rotary body 5 is rotationally manipulated, rotary body 5 rotates. Contact portion 4A of sliding contact 4 on the bottom surface of flange portion 5C of rotary body 5 slides on fixed contacts 2. ON/OFF signals are respectively produced between terminals 3A and 3C and between terminals 3B and 3C. A given function corresponding to the direction of rotation is operated under control of the signal processing circuit of the installed device and control portion based on the two trains of ON/OFF signals.

Because of the rotation of this rotary body 5, protrusive portion 17A of leaf spring 17 mounted to the bottom surface of cover plate 6 slides while in elastic contact with uneven portion 5D formed on the top surface of flange portion 5C of rotary body 5 and so a feeling of clicking corresponding to the position of uneven portion 5D is produced.

In the present embodiment 1, the end portion located on the side of terminal leading portion 1C of base body 1 on the opposite side of protrusive portion 17A of leaf spring 17 producing a feeling of clicking pushes and urges operative element 19 downward with a spring pressure. The position of operative element 19 is restricted by leg portions 18. Therefore, during rotation of rotary body 5, engagement portion 19A of operative element 19 also slides while in elastic contact with uneven portion 5D of rotary body 5.

The operation of this operative element 19 is described further. FIGS. 5-8 are cross-sectional views on P-P of FIG. 4. First, as shown in FIGS. 5 to 8, it is assumed that engagement portion 19A of operative element 19 which is in a stable state in a concave portion of uneven portion 5D rotates rotary body 5 in the direction of arrow 20 in the figure. As shown in FIG. 6, as rotary body 5 rotates, operative element 19 is pushed in the direction of rotation and moves into the position where the side surface comes into abutment with the inside wall of terminal leading portion 1C. At the same time, engagement portion 19A of operative element 19 incrementally moves upward on the tilted surface of uneven portion 5D against the spring pressure of leaf spring 17. After engagement portion 19A has reached the top portion of the convex portion of uneven portion 5D, if engagement portion 19A passes past the top portion of the convex portion as shown in FIG. 7, engagement portion 19A is made to rush down the inclined surface going toward a concave portion of uneven portion 5D by the spring pressure of leaf spring 17. Then, as shown in FIG. 8, the opposite side surface of operative element 19 collides against the corresponding inside wall of terminal leading portion 1C, producing small sound of collision.

The above-described operation of this operative element 19 is performed repeatedly and consecutively according to rotational manipulations. This produces a series of small sounds of collisions. These sounds of collisions create lilting sounds of manipulations during rotational manipulations. Consequently, an audiological sensation of manipulations is obtained.

If rotary body 5 is rotationally manipulated in the direction opposite to arrow 20, operative element 19 operates similarly to the foregoing but in the reverse direction, producing sounds of collisions.

A dimensional relationship may be so set that engagement portion 19A collides against the next inclined surface of uneven portion 5D to thereby produce sound before the side surface of operative element 19 collides against the inside wall of terminal leading portion 1C. A choice may be made according to favorite sound of collision.

Furthermore, sound of collision can be varied also by modifying the shapes of the colliding portion of the side surface of operative element 19 and colliding portion of the inside wall of terminal leading portion 1C or by changing the material of operative element 19 to a synthetic resin or the like. Therefore, favorite sound of manipulation can be obtained by making an appropriate choice.

In this way, according to the present embodiment 1, a rotationally manipulated encoder (rotary manipulation type electronic device) can be realized which produces lilting sounds of manipulations as rotary body 5 is rotationally manipulated, and permits one to obtain an audiological sensation of manipulations.

A feeling of clicking felt by rotationally manipulating rotary body 5 is synchronized with lilting sound by adjusting the positional relationship such that protrusive portion 17A of leaf spring 17 is located in a concave portion of uneven portion 5D while engagement portion 19A of operative element 19 is located in the concave portion of uneven portion 5D. A rotationally manipulated encoder (rotary manipulation type electronic device) can be accomplished which permits one to feel lilting sounds of manipulations which do not give feeling of oddness in terms of sense.

Embodiment 2

Embodiment 2 of the present invention is hereinafter described with reference to FIGS. 9 to 11. Those parts which are identical in configuration with their counterparts of embodiment 1 are denoted by the same numerals and their detailed description is omitted.

FIG. 9 is an exploded perspective view of a rotationally manipulated encoder according to an embodiment 2 of the present invention. FIG. 10 is a cutaway perspective view of main portions of the rotationally manipulated encoder according to the embodiment 2 of the invention. FIG. 11 is a cross-sectional view of main portions of the rotationally manipulated encoder according to the embodiment 2 of the invention. In these figures, base body 1 has hollow portion 1A. Fixed contacts 2 are arranged on the bottom portion of an opening. Terminal portions 3 electrically conducted to those fixed contacts 2 extend out. Central hole 5A of rotary body 5 is fitted over the outer periphery of inner peripheral wall 1B forming hollow portion 1A and thus rotary body 5 is combined rotatably. Uneven portion 5D is formed on the top surface of the outer periphery of flange portion 5C of rotary body 5. Sliding contact 4 sliding on fixed contact 2 is disposed on the bottom surface of flange portion 5C of the uneven portion. Cover plate 26 permits inner peripheral wall 1B of base body 1 and cylindrical portion 5B of rotary body 5 to protrude from center hole 26A. The cover plate is mounted so as to cover the top surface of the opening in base body 1. Annular leaf spring 27 having protrusive portion 27A making elastic and sliding contact with uneven portion 5D is mounted to the bottom surface of cover body 26. These are similar to those according to embodiment 1.

As shown in FIGS. 10 and 11, operative element 29 of the rotationally manipulated encoder according to the present embodiment is made of a sheet of a metal. Its shape is a substantially U-shaped form whose opening faces upward as viewed from a side. That is, both ends of flat plate portion 29C are bent upward, forming protrusive portions 29B. Downwardly convex engagement portion 29A is formed in a central portion of flat plate portion 29C.

Annular leaf spring 27 is shaped like a flat plate on the side of terminal leading portion 1C that is on the opposite side of protrusive portion 27A. This portion like a flat plate is in elastic contact with flat plate portion 29C of operative element 29. Downward spring pressure of annular leaf spring 27 brings downwardly convex engagement portion 29A into elastic engagement with uneven portion 5D of flange portion 5C.

Protrusive portions 29B at both ends formed on operative element 29 are vertically movably inserted into two guide holes 26B formed in cover plate 26. Thus, movement of operative element 29 in the direction of rotation and the outward direction going a way from the center of rotation is restricted. Furthermore, the operative element is disposed so as to be movable up and down.

The rotationally manipulated encoder according to the present embodiment 2 is constructed as described so far. The operation is next described. The operation for producing an ON/OFF signal from between terminals 3A and 3C and an ON/OFF signal from between terminals 3B and 3C by rotationally manipulating rotary body 5 is the same as in embodiment 1. Also, the operation for obtaining a feeling of clicking when leaf spring 27 makes elastic and sliding contact with uneven portion 5D of rotary body 5 is the same as in embodiment 1. Therefore, their detailed description is omitted.

The operation of operative element 29 performed at this time is described taking an example in which rotary body 5 is rotated from the state in which engagement portion 29A of operative element 29 is in a stable state within a concave portion of uneven portion 5D of rotary body 5. As rotary body 5 rotates, operative element 29 is pushed in the direction of rotation and moves a distance corresponding to the gap between each protrusive portion 29B and guide hole 26B in cover plate 26. At the same time, operative element 29 moves upward in such a way that engagement portion 29A incrementally ascends along the tilted surface of uneven portion 5D against downward spring pressure of leaf spring 27 while protrusive portions 29B at both ends inserted in guide holes 26B in the two locations are being guided. Operative element 29 reaches the top portion of the convex portion of uneven portion 5D. When the position at which the top portion abuts against engagement portion 29 a passes beyond the top portion of a convex portion of uneven portion 5D, operative element 29 is made to rush down the tilted surface going toward the concave portion by the spring pressure of leaf spring 27. At this time, engagement portion 29A of operating portion 29 collides against the tilted surface going toward the next convex portion of uneven portion 5D, producing small sound of collision.

The operation of operative element 29 accompanied by rotational manipulation is repeatedly performed. Engagement portion 29A of operative element 29 slides on uneven portion 5D of the top surface of flange portion 5C of rotary body 5. Small sounds of collisions produced successively at this time are heard as lilting sounds of manipulations.

Sounds of collisions can also be produced by setting the dimensions of associated parts such as operative element 29, guide holes 26B, and uneven portion 5D such that protrusive portions 29B of operative element 29 collide against the other side surface of guide holes 26B in cover plate 26.

Operative element 29 is operated in the same way as the foregoing but in the reverse direction if rotary body 5 is rotationally manipulated in the reverse direction. Consequently, sounds of collisions are produced.

In this way, according to the present embodiment, operative element 29 is made movable up and down by inserting protrusive portions 29B at both ends of operative element 29 into guide holes 26B at two locations formed in cover plate 26. Movement of operative element 29 in the direction of rotation and in the outward direction going away from the center of rotation is restricted only by cover plate 26. Consequently, a rotationally manipulated encoder (rotary manipulation type electronic device) which has a simple structure, produces lilting sounds of manipulations, and permits one to obtain an audiological sensation of manipulations can be easily accomplished.

The present invention has been described so far together with embodiment 1 and embodiment 2. As is obvious from these descriptions, in a rotary manipulation type electronic device of the present invention, as rotary body 5 is rotationally manipulated, engagement portion 19A (or 29A) of operative element 19 (or 29) engages uneven portion 5D of rotary body 5. Immediately after passing past a convex portion from a concave portion, spring pressure of leaf spring 17 (or 27) or the like causes the element to rush down a tilted surface going from the convex portion to the convex portion, and the operative element collides against the base body or the next inclined surface of uneven portion 5D. Thus, the electronic part can be designed to produce lilting sounds of manipulations. A rotary manipulation type electronic device which permits one to obtain an audiological sensation of manipulations can be offered.

Furthermore, with respect to the rotary manipulation type electronic device of the present invention, when rotary body 5 is rotationally manipulated, the electronic part can simultaneously produce a feeling of clicking according to the manipulations.

In addition, in the rotary manipulation type electronic device of the present invention, a feeling of clicking and lilting sound are synchronized. Therefore, a feel of manipulation without feeling of oddness is obtained.

Additionally, in the rotary manipulation type electronic device of the present invention, load at which protrusive portion 17A (or 27A) of leaf spring 17 (or 27) is brought into elastic contact with uneven portion 5D and load at which the operative element is brought into elastic contact are applied to the leaf spring with good balance. Therefore, stable spring load can be maintained for a long time.

Further, in the rotary manipulation type electronic device of the present invention, movement of operative element 19 (or 29) in the direction of rotation and other direction can be restricted only by a cover plate. Consequently, lilting sounds of manipulations can be obtained with a simple structure.

In the embodiments 1 and 2 of practice described so far, a rotationally manipulated encoder is described as an example. The present invention can also be applied to a rotary variable resistor, rotary switch, and so on. The operative element may take a shape other than the above-described shape. If the above-described structure in which operative element 19 or operative element 29 is pushed toward uneven portion 5D by leaf spring 17 or leaf spring 27 for obtaining a feeling of clicking is used, the structure can be made up of a small number of components. This gives rise to favorable results. However, the operative element may be pushed similarly with a separate spring body or the like.

As described so far, the rotary manipulation type electronic device according to the present invention permits one to obtain a feel of manipulations when rotational manipulations are performed. The part produces lilting sounds of manipulations, and audiological sensation of manipulations is also obtained. Accordingly, the rotary manipulation type electronic device according to the present invention is useful for adjustments of sound volume, sound quality, image quality, and so on in an AV device and for adjustment of the temperature of an in-vehicle air conditioning system. 

1. A rotary manipulation type electronic device including: a base body having an opening portion in which a functional part is provided, the functional part generating an electric signal by contact with a sliding contact; a rotary body having the sliding contact on its bottom surface, the rotary body having an uneven portion on an outer periphery, the rotary body being rotatably supported to the base body; a leaf spring making elastic contact with the uneven portion; and a cover plate having the leaf spring on its bottom surface, the cover plate providing a cover over the opening portion of the base body, the rotary manipulation type electronic device comprising: an operative element having an engagement portion making engagement with the uneven portion, wherein the operative element is so disposed that movement in the direction of rotation of the rotary body and an outward direction going away from the center of rotation is restricted and that the operative element is pushed downward by the leaf spring vertically movably.
 2. The rotary manipulation type electronic device of claim 1, wherein the leaf spring has a protrusive portion; and wherein the protrusive portion is in elastic contact with the uneven portion.
 3. The rotary manipulation type electronic device of claim 2, wherein the protrusive portion and the engagement portion are in engagement at positions synchronized with a concave portion or convex portion of the uneven portion.
 4. The rotary manipulation type electronic device of claim 2, wherein positions on the leaf spring at which the protrusive portions are formed are opposite to a position at which the leaf spring is in elastic contact with the operative element.
 5. The rotary manipulation type electronic device of claim 1, wherein the operative element has a upwardly protruding protrusive portion; and wherein the operative element is disposed in such a way that the protrusive portions are vertically movably inserted in guide holes formed in the cover plate. 